Does Poshmark Pay for Shipping?
Yes, in the sense that matters to a seller: the buyer pays a flat shipping fee set by Poshmark, and Poshmark sends the seller a prepaid USPS shipping label covering it, for any package up to 5 lb. The seller never opens their wallet for shipping at that weight, the label just shows up after the sale.
How the flat rate works
Poshmark sets a single flat shipping charge that applies to every standard sale, regardless of the item's price or the buyer's actual distance from the seller. That rate has moved over time as Poshmark has adjusted it, so rather than quote a figure that may already be stale by the time you read this, check the shipping line on your own sale, it applies uniformly and is shown before the buyer checks out.
The 5 lb line is where it stops being free for the seller
The prepaid label Poshmark generates covers packages up to 5 lb. If your item and packaging push the shipment over that weight, you have to purchase an upgraded label yourself, the buyer's payment doesn't increase to cover it. This is the one case where "Poshmark pays for shipping" isn't quite true, sellers of anything bulky or heavy (boots, coats, multi-item bundles) should weigh the package before listing to know whether they'll eat that difference.
Shipping is separate from Poshmark's commission
The buyer's shipping payment and Poshmark's selling fee are two different things. The commission, a flat 20% above $15 or $2.95 below it, is calculated on the item price alone; shipping money doesn't run through the seller's payout at all in the standard flow. See what percent does Poshmark take for the commission breakdown, or use the Poshmark fee calculator for your item's exact payout.